Chromosomal DNA deletion confers phage resistance to Pseudomonas aeruginosa.

Chromosomal DNA deletion confers phage resistance to Pseudomonas aeruginosa.
复制标题

染色体 DNA 缺失赋予噬菌体对铜绿假单胞菌的抗性

DOI:
10.1038/srep04738
复制
发表时间:
2014-04-28
期刊:
影响因子:
4.6
通讯作者:
Hu F
Hu F
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Le S;Yao X;Lu S;Tan Y;Rao X;Li M;Jin X;Wang J;Zhao Y;Wu NC;Lux R;He X;Shi W;Hu F

文献摘要

参考文献

被引文献

相似文献

细菌发展了广泛的噬菌体抗性机制,例如防止噬菌体吸附和CRISPR/Cas系统,以在噬菌体捕食中存活。本研究用溶菌噬菌体PaP 1感染铜绿假单胞菌PA 1株,筛选抗噬菌体突变株。这些突变体中的高百分比(~30%)显示红色色素沉着表型(红色突变体)。通过比较基因组分析,发现一个红色突变体PA 1 r有一个219.6 kb的基因组片段缺失,其中包含两个与观察到的表型相关的关键基因hmgA和galU。缺失hmgA导致红色化合物尿黑酸的积累;而A galU突变体缺乏噬菌体吸附所需的O-抗原。有趣的是,虽然galU的丢失赋予噬菌体抗性,但在小鼠感染实验中它显着减弱了PA 1 r。我们的研究揭示了一种新的噬菌体耐药机制,通过染色体DNA缺失在铜绿假单胞菌。
Bacteria develop a broad range of phage resistance mechanisms, such as prevention of phage adsorption and CRISPR/Cas system, to survive phage predation. In this study, Pseudomonas aeruginosa PA1 strain was infected with lytic phage PaP1, and phage-resistant mutants were selected. A high percentage (~30%) of these mutants displayed red pigmentation phenotype (Red mutant). Through comparative genomic analysis, one Red mutant PA1r was found to have a 219.6 kb genomic fragment deletion, which contains two key genes hmgA and galU related to the observed phenotypes. Deletion of hmgA resulted in the accumulation of a red compound homogentisic acid; while A galU mutant is devoid of O-antigen, which is required for phage adsorption. Intriguingly, while the loss of galU conferred phage resistance, it significantly attenuated PA1r in a mouse infection experiment. Our study revealed a novel phage resistance mechanism via chromosomal DNA deletion in P. aeruginosa.
DOI: 10.1186/1471-2180-11-102
发表时间: 2011-05-14
期刊: BMC microbiology
影响因子: 4.2
作者:
Garbe J;Bunk B;Rohde M;Schobert M
通讯作者: Schobert M
DOI: 10.1111/j.1461-0248.2011.01624.x
发表时间: 2011-07-01
期刊: ECOLOGY LETTERS
影响因子: 8.8
作者:
Hall, Alex R.;Scanlan, Pauline D.;Buckling, Angus
通讯作者: Buckling, Angus
DOI: 10.1371/journal.pgen.1002651
发表时间: 2012
期刊: PLoS genetics
影响因子: 4.5
作者:
Lee MC;Marx CJ
通讯作者: Marx CJ
DOI: 10.1016/s0378-1097(02)00641-9
发表时间: 2002-05-07
影响因子: 2.1
作者:
Dean, CR;Goldberg, JB
通讯作者: Goldberg, JB
DOI: 10.1007/978-1-4614-3567-9_16
发表时间: 2012-01-01
期刊: EVOLUTIONARY SYSTEMS BIOLOGY
影响因子: --
作者:
Buckling, Angus;Brockhurst, Michael
通讯作者: Brockhurst, Michael